Another option is the Teves system originally used in the mid 2000s BMW M3 CSL (European high end sport model). This is a popular system with club racers, even as a replacement for factory late model Porsche systems.
It requires active ABS sensors, e.g. of the type used in various late model Bosch setups. In my case, I used 2009+ vette hubs all around.
I sourced my system, less hubs but complete with wire harness, for less than $4K from Curt Jung at Jung Motorsports, 713-447-5864. Don't quote me on the price, it may have changed by now! I chose a basic Teves setup with the same controller and calibration used in the road car, but it has worked very well for me in the last 2 years of track days in my 69 Camaro. There are more advanced Teves motorsport setups as well, Curt can give you details.
I'm personally upgrading to the killer Bosch M4 ClubSport system, but that is serious $$ even if you find a more price friendly overseas dealer.
Scott
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